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Oldham OLCT 100 and OLC 100 Fixed Gas Detector

  4-20 mA analog transmitter without display
  SIL2 capability for LEL, O2, CO, H2S, NH3, CO2
  Detects combustible, toxic or refrigerant gases and O2
  Available with electrochemical, infrared or semi-conductor sensors
  Designed for industrial applications
  Available in explosion-proof or intrinsically safe versions, and stainless steel
  New XP IR infrared sensor or catalytic sensor
  A high-temperature version allows operation up to 200°C

The Oldham OLCT 100 and OLC 100 Fixed Gas Detector has been built in order to detect explosive gases, toxic gases or oxygen. With a Wheatstone bridge output (OLC 100) or 4-20mA output (OLCT 100), the Oldham OLCT 100 and OLC 100 are suitable for every application, with product versions designed specifically for catalytic, electrochemical, semiconductor, or poison control.

With the benefit of ATEX approval, the Oldham OLCT 100 and OLC 100 are available in explosion safe or intrinsically safe versions.

An infrared sensor is available in addition to this range. This sensor allows use in a much more severe types of environment, where the presence of poisons could harm the use of a catalytic sensor.


Data Sheet

Oldham OLCT 100 and OLC 100 Fixed Gas Detector

The product versions include:

OLCT 100 XP: Explosion-proof version and equipped with a catalytic, electrochemical or semiconductor sensor, for detection of explosive, toxic gases or oxygen.

OLCT 100 IS: Intrinsically safe version and equipped with an electrochemical sensor for detection of toxic gases or oxygen.

OLCT 100 XP IR: Explosion-proof version and equipped with an infrared sensor for detection of explosive gases or CO2.

OLCT 100 XP HT: High temperature explosion-proof version, for detection of explosive gases up to 200°C.

Model OLC 100 OLCT 100 XP OLCT 100 XP IR OLCT 100 XP OLCT 100 XP HT OLCT 100 XP OLCT 100 IS
Sensor Catalytic bead Catalytic bead Infrared Electrochemical Catalytic bead Semi-conductor Electrochemical
Dimensions (mm) (inches) 135 x 133 x 84 5.43 x 5.24 x 3.31" 135 x 133 x 84 5.43 x 5.24 x 3.31" 179 x 135 x 84 7.05 x 5.43 x 3.31" 179 x 135 x 84 7.05 x 5.43 x 3.31" 150 x 135 x 84 5.91 x 5.43 x 3.31" 179 x 135 x 84 7.05 x 5.43 x 3.31" 179 x 135 x 84 7.05 x 5.43 x 3.31"
Weight (kg) 0.95 1 1.1 1.1 1.8 1.1 1.1
Ingress Protection IP66 IP66 IP66 IP66 IP66 IP66 IP66
Cable Entry M20 or ¾ NPT M20 or ¾ NPT M20 or ¾ NPT M20 or ¾ NPT M20 or ¾ NPT M20 or ¾ NPT M20 or ¾ NPT
Supply Voltage only by OLDHAM Controller 15.5 to 32 VDC 13.5 to 32 VDC 10 to 32 VDC 15.5 to 32 VDC 15.5 to 32 VDC 15.5 to 32 VDC
Average Consumption 340 mA 110 mA 80 mA 23.5 mA 100 mA 100 mA 23.5 mA


Ordering Information


ACCESSORIES FOR OLC(T)100

NPO100GB User manual OLC(T) 100 in English language, printed version
NPO100FR User manual OLC(T) 100 in French language, printed version
B301372 Duct mounting kit for OLCT 100
6184703 Zener barrier to be mounted on DIN rail
6797192 Casing for 2 zener barriers
6797547 Casing for 5 zener barriers
6331169 Wall Mounted Collecting Cone for OLC(T) 100
6331168 Ceiling Mounted Collecting Cone for OLC(T) 100
6329014 Reinforced splash guard kit for OLC(T) 20, 40, 50, 60, 80 and 100
6329004 Splash guard kit for OLC(T) 20, 40, 50, 60, 80 and 100
6331141 Calibration cup (all detectors except OLCT IR, all gases)
6322420 CEX/CTX 300 , OLC(T) 40, 50, 60 and 100 ceiling-mount
6335976 Active carbon filter for OLCT except OLCT IR
6335918 Humidifier kit for transmitters with Semi-conductor Sensor
6335975 PTFE water barrier for OLCT except OLCT IR
6343489 Cable-gland kit, M20, stainless steel, for armoured cable
6343493 Cable-gland kit, M20, stainless steel, for unarmoured cable
6343495 Cable-gland kit, M20, nickelled brass, for armoured cable
6343499 Cable-gland kit, M20, nickelled brass for unarmoured cable
6147879 Tools kit for OLCT 100 including allen keys, special keys, flat cable, calibration cup
6145874 Case key for OLCT 100
6793718 CEX300, OLC(T)50, 100, universal mounting Adapter Plate
6123716 Sunshield for 300series, OLC(T) 40, 50, 60, 80 and 100
6327910 PTFE sampling cup, all gases, all OLCT 20, 40, 50, 60, 80 and 100 (except OLCT IR and 700 series)
6327911 Remote calibration cup for OLCT 20, 40, 50, 60, 80 and 100
6793322 Universal pitot tube with DN 80 flange (requires a detector with circulation cup)



Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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